SP 2.6 has broken the CIVA-INS on my system.

Everything stock, fresh clean install.   The INS aligns, goes green, switch to NAV mode.   I takeoff, get cleaned up, ATC turns me to first fix, fly to fix with AP on, Manual mode, HDG switch on, selector on "B".    I get to the point where ATC tells me to turn and proceed on course, I switch to "A" on the selector, the plane keeps following the manual heading setting.


It was working as it should in 2.5